public class JavaSE721 {
    public static void main(String[] args) {
        /*System.out.println("你好");
        System.out.println(3.14);
        System.out.println(5);
        System.out.println(false);
        System.out.println('4');*/
        /*long lo = 10L;
        int i = 10;
        lo = i;*/
        /*System.out.println(Integer.MAX_VALUE);
        System.out.println(Integer.MIN_VALUE);*/

        /*int a = 10;
        int b = 20;
        System.out.println("a=" + a + "b=" + b);
        System.out.println("a + b = " + a + b);
        System.out.println(a + b + "a + b");*/

       /* int num = 10;
        double number = 10.5;
        System.out.println(String.valueOf(number));
        System.out.println(String.valueOf(num));*/

        String s = "100";
        System.out.println(Integer.parseInt(s));
        System.out.println(Double.parseDouble(s));
    }
}
